No, or at least I don't think so. At the gate, Frontier was offering a $500 voucher to switch to a later flight. The problem, of course, is that with Frontier, there really isn't a plausible "later flight." It was a once a day route and they did tell people (who asked) that there were no seats on the next day's flight. Understandably, I saw only 2 people voluntarily accept this payment.

Beyond that, the rules seem to get murky. I do think this qualifies for IDB, but I'm not entirely sure. Even if it does, Frontier can limit the compensation to "4x one way fare." Is that the average fare or YOUR fare? On Frontier, I would expect the average fare could be less than $100. I have no idea how all their incidentals are treated. This does not seem like a good deal for most folks, especially when Frontier does not have a reasonable alternative flight.

https://www.transportation.gov/indiv...ping-oversales